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Ways to lighten my DH bike?

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Ways to lighten my DH bike?
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flag biker4life124
FL
Posted: Apr 28, 2008 at 23:26 Quote
Hi I have a GT-Dhi Pro and want to lighten it a bit.

Basic specs

2008 gt dhi frame
Boxxer race/WC forks
E.13 srs with carbon bash
Carbon seatpost, shit seat
mavic 823 on dt swiss fr hubs
minion 2.5 rubber
gravity light cranks, 36t chain ring
Saint brakes 8" front, 6" rear


blah blah blah

So what ways are there to lighten it up a bit


Im thinking wheels? What is a good wheelset that will save a bit of weight but not crumple first DH run?

Picture is before some upgrades

Unsecure image, only https images allowed: http://www.vorb.org.nz/modules.php?name=Coppermine&file=displayimagepopup&pid=28131&fullsize=1
Cheers,


Adrian
flag coca
Posted: Apr 28, 2008 at 23:38 Quote
Unsecure image, only https images allowed: http://www.vorb.org.nz/images/albums/userpics/18573/P1050032.JPGLG1
721(or 823 if you want tubless) on Pro II's
Get a good seat (WTB Thinline Silverado?)
MG1's
Is your fork the race or the WC? Can't see your left leg to tell...
Ti spring
2.35 tires
Dont know your bar stem (but maybe Sunline direct/v1, or sunline and Monkey lite dh?)

What is the rest of your spec?
flag biker4life124
FL
Posted: Apr 28, 2008 at 23:44 Quote
coca wrote:
Unsecure image, only https images allowed: http://www.vorb.org.nz/images/albums/userpics/18573/P1050032.JPGLG1
721(or 823 if you want tubless) on Pro II's
Get a good seat (WTB Thinline Silverado?)
MG1's
Is your fork the race or the WC? Can't see your left leg to tell...
Ti spring
2.35 tires
Dont know your bar stem (but maybe Sunline direct/v1, or sunline and Monkey lite dh?)

What is the rest of your spec?

fork is air sprung wc but race everything else. Chain guide has a mrp carbon bash guard so would a lg1 save that much weight?

Ti spring, yup thats a good idea

Tubeless isnt really my thing, what wheels are light but strong enough for a light guy racing DH?

Funn direct mount stem + gravity 710mm bar o/s

I like my 2.5s at this stage.
flag prezes1984
Posted: Apr 28, 2008 at 23:53 Quote
tires - intense ex dc dh lite - kevlar version 2,3 they or about 880 g so they are lighter than maxxis,
for a race run I would get a xc ultra light seat,
fox air - forgot the name but some air suspension for the rear
wheels mavic rims - 721

sorry for my english
flag Chukoff
Posted: Apr 29, 2008 at 0:03 Quote
What about lighter cassete? I like Sram products, road PG970 is a good choice.
Wellgo MG-1 are realy light (380g). LG-1 chainguide will help to reduce more weight.

As for tires have a look on 2.35 Nevegals, they look like 2.5 Maxxis.

To tell the truth I am also looking for the way of lightening my Norco Team DH, and probably will run 2.35s.

By the way http://sicklines.com is a good resource about component's weight, there is much useful information there.
flag signorvince2
Posted: Apr 29, 2008 at 0:09 Quote
How much does that weigh now?
flag calgaryrider
Posted: Apr 29, 2008 at 7:15 Quote
Other than swapping to tubeless rubber and a direct mount stem and carbon bar theres nothing to really do to lighten it up that much. I'd seriously think twice about switching to tubeless, I mean you already have 823s, and you can shed probably a pound maybe even two without tubes and rotational weight is what you notice the most.
flag pbuser102331
Posted: Apr 29, 2008 at 7:21 Quote
sdg i beam seat and post will save a fair whack,and maybe saint cranks.
flag skd209
Posted: Apr 29, 2008 at 7:24 Quote
gamut chain guide. pedals can help, but idk how heavy yours are. carbon......
flag MathiasROlsen
Posted: Apr 29, 2008 at 7:25 Quote
Have you look at the Sunline Rock Shox Boxxer Direct Mount Stem?

Unsecure image, only https images allowed: http://www.chainreactioncycles.com/Interface/Images/newsphoto/Boxxer-stem.jpg
Those are really light (147g) and cheap.
flag ridiculous
Posted: Apr 29, 2008 at 7:28 Quote
your bike is built with some pretty light ocmponents as is. You could get a new seat and ti spring. But most importantly like you said wheels. For a light guy stans flow rims would probably be ok and they are under 500g a rim. keep your hubs and save some money. A road cassette and derailleur would also help keep your unsprung weight down.
flag biker4life124
FL
Posted: Apr 29, 2008 at 16:06 Quote
Ok, i will look into tubeless tyres
flag eddiech
Posted: Aug 22, 2008 at 18:39 Quote
you can cut down your seatpost and bars if you like...

look into carbon CNT seatpost and handlebars, direct mounts, tubless tyres.
flag seanyboy760
Posted: Aug 22, 2008 at 23:13 Quote
instead of a ti spring you can even do an air shock, the new gravity light bars, E13 lightguide and cut your bash guard in half, tubless for sure, wellgo pedals, chris king headset, and if you really want to get technical you can replace all the bolts on your bike with ti bolts
flag seanyboy760
Posted: Aug 22, 2008 at 23:14 Quote
oh ya and road cassete or take like the first two cogs off your cassete
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